andrea mitchell looked into the truth behind the rhetoric of both candidates. >> let me repeat what i said. i'm not in favor of a $5 trillion tax cut. that's not my plan. my plan is not to put in place any tax cut that will add to the deficit. >> reporter: romney has proposed making the bush tax cuts permanent for all tax levels and then cutting all rates an additional 20%. he would repeal the alternative minimum tax and repeal the estate tax. they said mitt romney's tax plan would cost $4.8 trillion over ten years. he said his plan would be paid for but to pay for those he would have to close loopholes and get rid of some tax deductions, he said, and tax credits, but he's repeatedly refused to say which deductions he would get rid of saying he would work with congress to make those decisions. also president obama said his plan would cut the deficit by $4 trillion. >> we all know that we've got to do more so i put forward a specific $4 trillion deficit reduction plan. it's on a website. you can look at all the numbers, what cuts we make and what revenue we raise. >> reporter: that est